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Old 24-07-2021, 12:01 PM
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koputai (Jason)
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Sample image wanted

Hi Guys and Gals,


I sold most of my gear years ago, but have now got a bit of time so am starting to dream again.


Before I go out and spend lots of money (again) on scopes, mounts, cameras etc, I thought I'd try and get some practice in on the image processing side of things. I have used the old 7D to take a few hundred lights, darks, biases, flats, but as it's unguided and very short exposures, even my stacked results are pretty shabby.


I'm hoping someone might share a decent stacked .tif file ready for processing that I can practice with. Of course I wouldn't post results as my own or anything, it would be just for my personal use at home.


Alternatively, is there somewhere I can purchase such a file online?


Thanks for your consideration.


Cheers,
Jason.
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Old 25-07-2021, 02:26 PM
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PKay (Peter)
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To easy Jason

Can give you any format, LRGB Ha, S2, O3 combined or separate.

Here is a LRGB image (Non Linear) of M33 after stacking and combining saved as .TIF.

https://1drv.ms/u/s!AoeEixCwZOsLgnjT...JDcaJ?e=lP4dQ8

I don't work with TIF files so good luck!

Needs to be trimmed, background removal, noise removal, deconvolution, curves and anything else you can think of.

Have fun and YES post your work here!

Offer is open to anyone, just give me a credit
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Old 25-07-2021, 03:35 PM
Zuts
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Apparently you can get the raw hubble data which is available for processing https://www.instructables.com/How-to...egacy-Archive/
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Old 26-07-2021, 08:50 AM
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Thanks for the info guys, and thanks very much Peter for generously sharing your data, it’s much appreciated.

I’ll have a go at it, and post here if the results aren’t too laughable!

Cheers,
Jason.
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Old 26-07-2021, 11:51 AM
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My basic test processing, just curves.

Quote:
Originally Posted by PKay View Post
Here is a LRGB image (Non Linear) of M33 after stacking and combining saved as .TIF.
https://1drv.ms/u/s!AoeEixCwZOsLgnjT...JDcaJ?e=lP4dQ8
I don't work with TIF files so good luck!
Needs to be trimmed, background removal, noise removal, deconvolution, curves and anything else you can think of.
Have fun and YES post your work here!
Offer is open to anyone, just give me a credit


Peter,

This is your image data and how I usually do processing (after stacking) in a hurry (and otherwise), using Canon DPP (curves only).
I was always thinking there should be more to it, so I am very interested to see how additional processing can improve this image (which is excellent already and close to the limit of equipment capabilities IMO).
Attached Thumbnails
Click for full-size image (m33.jpg)
214.8 KB23 views

Last edited by bojan; 26-07-2021 at 12:09 PM.
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Old 26-07-2021, 01:52 PM
PaulSthcoast (Paul)
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Ok....

I was hesitant to post a reply to the challenge.

There were a few choices for my processing,
but I went with Snap seed for the first image and
Windows viewer for the second.

Like Bojan, I used curves to do the bulk of the processing.

A little noisy, but over all I'm happy with the result.

Thanks Peter.

Paul.
Attached Thumbnails
Click for full-size image (Resized_M33_LRGB_02_-_Copy_(2)_(1)-01.jpg)
186.3 KB15 views
Click for full-size image (Resized_Screenshot_20210726-140419_Gallery.jpg)
123.4 KB16 views

Last edited by PaulSthcoast; 26-07-2021 at 02:04 PM.
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Old 26-07-2021, 01:56 PM
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Quote:
Originally Posted by bojan View Post
Peter,

This is your image data and how I usually do processing (after stacking) in a hurry (and otherwise), using Canon DPP (curves only).
I was always thinking there should be more to it, so I am very interested to see how additional processing can improve this image (which is excellent already and close to the limit of equipment capabilities IMO).
Hi Bojan

Each channel was stacked (after calibration), and stretched.
Then LRGB combination.

No other processing done.

Maybe it would have been better to offer the 4 channels in linear format?

Have I made it to easy?
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Old 26-07-2021, 02:06 PM
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Quote:
Originally Posted by PKay View Post
...Maybe it would have been better to offer the 4 channels in linear format?
Have I made it to easy?

Maybe
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Old 27-07-2021, 03:03 PM
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PKay (Peter)
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Quote:
Originally Posted by PaulSthcoast View Post
Ok....

I was hesitant to post a reply to the challenge.

There were a few choices for my processing,
but I went with Snap seed for the first image and
Windows viewer for the second.

Like Bojan, I used curves to do the bulk of the processing.

A little noisy, but over all I'm happy with the result.

Thanks Peter.

Paul.
Done good Paul

Secound image is the better one.

Never used 'Snap seed' , might have used 'Windows viewer', for viewing...

Take Martin's advice and try Startools maybe ( I use PixInsight).

Always a learning curve, whatever path you go down
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